I’m extremely skeptical of your claims that you learned Chinese grammar in a week as a Chinese learner myself and I’m willing to bet you don’t realize how much you don’t know. The Chinese grammar wiki has 505 articles on grammar split across A1-C1 levels of the European Common Framework for language proficiency. This wiki is also non-exhaustive. This isn’t even including the fact that Classical Chinese, which is a basis for many 成语 used today, has a completely different grammar than modern Chinese.